Cryptoperla hubleyi, Stark & Sivec, 2007

Stark, Bill P. & Sivec, Ignac, 2007, New Species And Records Of Asian Peltoperlidae (Insecta: Plecoptera), Illiesia 3 (12), pp. 104-126 : 109-110

Cryptoperla hubleyi sp. nov.

( Figs. 15-24 )

Material examined. Holotype ♂ from Vietnam, Thua Thien-Hue, Bach Ma National Park, small stream ca. 100 m past Five Lakes Trail , 1200 m, 16 ° 11’ 37” N, 107 ° 51’ 19” E, Mercury vapor light, 9 June 2000, B. Hubley, ROM 2000518 ( ROM) . Additional material: Vietnam, Thua Thien-Hue, Bach Ma National Park, small stream along Five Lakes Trail , 1200 m, 16 ° 11’ 20” N, 107 ° 51’ 08” E, 10 June 2000, B. Hubley, ROM 2000519 , 4 larvae ( ROM) .

Adult habitus. Biocellate. Head yellow with slightly darker yellow brown area over ocelli and central frons. Pronotum mostly yellow brown with scattered pale rugosities and a conspicuous mesal pale spot on median suture. Femora yellow, tibiae and tarsi darker. Wings transparent, veins pale amber.

Male. Forewing length 10 mm. Posterior margin of tergum 10 parabolic ( Fig. 15 ). Basal cercal segment ca. 4X long as basal width and with relatively dense inner marginal setal fringe ( Fig. 16 ); apex of basal segment curved sharply dorsad and armed with a single prominent spur attached to segment at an approximate right angle in lateral aspect. Vesicle ca.

1.5X long as basal width ( Fig. 17 ).

Female. Unknown.

Larva (putative). Pre-emergent body length 7.5-9.0 mm. General color brown to reddish brown. Pronotum with a pair of small circular pale spots located midway between median suture and lateral margins. Thoracic sterna without setal fringes except on anterior margin of prosternum and laterally around coxal bases of mesosternum and metasternum ( Fig. 18 ); posterior notal margins with dense rows of short blunt setae, angles of metathorax with longer pointed setae. Abdominal terga 4-9 uniformly red brown; anterior terga paler and tergum 10 yellow brown. Abdominal terga without conspicuous bristles except 2-4 subapical ones on tergum 10; terga clothed with dark clothing hairs and minute spicules over entire surface; posterior fringe primary bristles widely spaced and short with shorter clavate setae interspersed ( Figs. 19 , 22 ); posterior sternal fringe bristles longer and without clavate setae ( Fig. 21 ). Cerci with less than 15 segments, apical 4-5 with a single thick, moderately long dorsal and ventral bristle in segmental whorl ( Figs. 20 , 23-24 ). Paraproct gills short, not projecting beyond tip of paraprocts and difficult to observe; ventromedian area of tergum 10 apex apparently without gills; mesothorax and metathorax with supracoxal gills beneath wingpads; prothorax and thoracic sterna without gills.

Etymology. The patronym honors B. Hubley, collector of the holotype and larval specimens.

Diagnosis. This species is closely related to C. karen and C. curvata . Males are distinguished from both by the unidentate cercal spur, and by the sharp angle at which the spur joins the basal segment.

Figures

Figs. 13-20. Cryptoperla structures. 13-14. C. fraterna. 13. Female terminalia, 14. Larval thoracic sterna, 15-20. C. hubleyi. 15. Male terminalia, dorsal, 16. Male basal cercal segments, lateral, 17. Male sternum 9, 18. Larval thoracic sterna, 19. Larval abdominal terga, 20. Larval cercal segments 5-12, lateral.

Figs. 21-24. Cryptoperla hubleyi micrographs of larval structures. 21. Abdominal sternum 8, posterior fringe and clothing hairs, 22. Abdominal tergum 8, posterior fringe with clavate setae, 23. Dorsal aspect cercal segments 9-10, 24. Ventral aspect subapical cercal segments.